bfd/elf32-i386.c

   1 /* Intel 80386/80486-specific support for 32-bit ELF
   2    Copyright 1993 Free Software Foundation, Inc.
   3
   4 This file is part of BFD, the Binary File Descriptor library.
   5
   6 This program is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2 of the License, or
   9 (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with this program; if not, write to the Free Software
  18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20 /*
  21  * This file contains changes from the Open Software Foundation.
  22  */
  23
  24 #include "bfd.h"
  25 #include "sysdep.h"
  26 #include "libbfd.h"
  27 #include "libelf.h"
  28
  29 #define USE_REL 1               /* 386 uses REL relocations instead of RELA */
  30
  31 enum reloc_type
  32   {
  33     R_386_NONE = 0,
  34     R_386_32,           R_386_PC32,
  35     R_386_GOT32,        R_386_PLT32,
  36     R_386_COPY,
  37     R_386_GLOB_DAT,     R_386_JUMP_SLOT,
  38     R_386_RELATIVE,
  39     R_386_GOTOFF,       R_386_GOTPC,
  40     R_386_max
  41   };
  42
  43 #if 0
  44 static CONST char *CONST reloc_type_names[] =
  45 {
  46   "R_386_NONE",
  47   "R_386_32",           "R_386_PC32",
  48   "R_386_GOT32",        "R_386_PLT32",
  49   "R_386_COPY",
  50   "R_386_GLOB_DAT",     "R_386_JUMP_SLOT",
  51   "R_386_RELATIVE",
  52   "R_386_GOTOFF",       "R_386_GOTPC",
  53 };
  54 #endif
  55
  56
  57 static reloc_howto_type elf_howto_table[]=
  58 {
  59   HOWTO(R_386_NONE,  0,0, 0,false,0, complain_overflow_dont, 0,"R_386_NONE", false,0x00000000,0x00000000,false),
  60   HOWTO(R_386_32,    0,2,32,false,0,  complain_overflow_bitfield,  0,"R_386_32",   false,0xffffffff,0xffffffff,false),
  61   HOWTO(R_386_PC32,  0,2,32,true, 0, complain_overflow_signed,  0,"R_386_PC32", false,0xffffffff,0xffffffff,false),
  62   HOWTO(R_386_GOT32, 0,2,32,false,0,  complain_overflow_bitfield,  0,"R_386_GOT32",false,0xffffffff,0xffffffff,false)
  63 };
  64
  65 #ifdef DEBUG_GEN_RELOC
  66 #define TRACE(str) fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
  67 #else
  68 #define TRACE(str)
  69 #endif
  70
  71 static CONST struct reloc_howto_struct *
  72 DEFUN (elf_i386_reloc_type_lookup, (abfd, code),
  73        bfd *abfd AND
  74        bfd_reloc_code_real_type code)
  75 {
  76   switch (code)
  77     {
  78     case BFD_RELOC_NONE:
  79       TRACE ("BFD_RELOC_NONE");
  80       return &elf_howto_table[ (int)R_386_NONE ];
  81
  82     case BFD_RELOC_32:
  83       TRACE ("BFD_RELOC_32");
  84       return &elf_howto_table[ (int)R_386_32 ];
  85
  86     case BFD_RELOC_32_PCREL:
  87       TRACE ("BFD_RELOC_PC32");
  88       return &elf_howto_table[ (int)R_386_PC32 ];
  89
  90     default:
  91       abort ();
  92     }
  93
  94   TRACE ("Unknown");
  95   return 0;
  96 }
  97
  98 static void
  99 DEFUN(elf_i386_info_to_howto, (abfd, cache_ptr, dst),
 100       bfd               *abfd AND
 101       arelent           *cache_ptr AND
 102       Elf32_Internal_Rela *dst)
 103 {
 104   BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < R_386_GOT32);
 105
 106   cache_ptr->howto = &elf_howto_table[ELF32_R_TYPE(dst->r_info)];
 107 }
 108
 109 static void
 110 DEFUN(elf_i386_info_to_howto_rel, (abfd, cache_ptr, dst),
 111       bfd               *abfd AND
 112       arelent           *cache_ptr AND
 113       Elf32_Internal_Rel *dst)
 114 {
 115   BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < R_386_GOT32);
 116
 117   cache_ptr->howto = &elf_howto_table[ELF32_R_TYPE(dst->r_info)];
 118 }
 119
 120 #define TARGET_LITTLE_SYM               bfd_elf32_i386_vec
 121 #define TARGET_LITTLE_NAME              "elf32-i386"
 122 #define ELF_ARCH                        bfd_arch_i386
 123 #define elf_info_to_howto               elf_i386_info_to_howto
 124 #define elf_info_to_howto_rel           elf_i386_info_to_howto_rel
 125 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
 126
 127 #include "elf32-target.h"